https://api.drupal.org/api/drupal/core%21tests%21Drupal%21KernelTests%21Core%21Block%21MultipleBlockFormTest.php/11.x
MultipleBlockFormTest.php | Drupal API
phpdrupalapi
https://api.drupal.org/api/drupal/core%21tests%21Drupal%21KernelTests%21Core%21Block%21MultipleBlockFormTest.php/function/MultipleBlockFormTest%3A%3AtestMultipleForms/9
function MultipleBlockFormTest::testMultipleForms | Drupal API
functiondrupalapi